The schema_name command is used to check if a MySQL database exists or not. The syntax of this command is as follows −select schema_name from information_schema.schemata where schema_name = 'database name';Now, the above command is used to check whether the database exists or not. The query for that is as ... Read More

To update a column value, the update command as well as the replace method can be used. The steps to better understand these are given as follows −First create a table with the help of the create command. This is given as follows −mysql> CREATE table DemoOnReplace -> ( -> ... Read More

Add a button to play or pause the video. Then we have styled the video to a hundred percentage height and width so that it covers the entire background.The following is the code snippet to set video as a site background in HTML5.        Your browser does not ... Read More

You can try to run the following code to create a vertical button groupExampleLive Demo                    .mybtn .button {             background-color: orange;             border: 1px solid green;             width: 120px;             color: white;             font-size: 14px;             padding: 10px;             text-align: center;             text-decoration: none;             display: block;          }                              Result          Result          Result          Result          

Video files on the web sometimes need to be encoded in a special way in order for them to be played while downloading. In order for flash-based videos to work, data should be moved from the end to the start of the stream. A program called mp4 FastStart can do ... Read More

As stated by w3.org −The autofocus attribute is a boolean attribute. The presence of a boolean attribute on an element represents the true value, and the absence of the attribute represents the false value.If the attribute is present, its value must either be the empty string or a value that ... Read More

The uksort() function sorts an array by keys using a user-defined function. It returns TRUE on success and FALSE on failure.Syntaxuksort(arr, custom_function)Parametersarr − The specified array.custom_function − The comparison function. It must return an integer less than, equal to, or greater than zero if the first argument is considered to ... Read More

Circular singly linked list is a type of data structure that is made up of nodes that are created using self referential structures. Each of these nodes contain two parts, namely the data and the reference to the next list node.Only the reference to the first list node is required ... Read More

The acos() function returns the inverse cosine of an angle given in radians. It is an inbuilt function in C++ STL.The syntax of the acos() function is given as follows.acos(var)As can be seen from the syntax, the function acos() accepts a parameter var of data type float, double or long ... Read More

To specify the number of columns an element should be divided into, use the column-count property.You can try to run the following code to implement the column-count property with 4 columnsExampleLive Demo                    .demo {           ... Read More